Since Beast Wars is official canon from Hasbro (well the Kenner division of Hasbro) and it ended up being a continuation of the G1 cartoon continuity I include it in what I consider canon. The inconsistencies in it I put down to two things: 1) a bunch of time has passed from The Rebirth to Beast Wars so many things have changed like the Quintessons were forgotten about by the likes of Kup and Hot Rod before the events of the movie the Maximals may have forgotten them and started believing in Primus. 2) It's not like the G1 cartoon was without inconsistencies, origin of the Constructicons ring a bell???.